Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efc6da913f279f0…

MALICIOUS

PDF

34.2 KB Created: 2021-06-22 13:33:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3557b6a88fe1ff92b90b279b67527715 SHA-1: 58d6f20b6677f61abe0fee5a1134c9012fcd9ccc SHA-256: 1efc6da913f279f0334e0fe70d1977aff8c97059a6052732ab818dee1ed7f329
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate a redirection to a game hack generator. The embedded URLs are likely used to download a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/best-ways-to-get-free-robux-game-hack PDF link annotation
    • http://krumerhaus.at/images/free-roblox-games-no-sign-up_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/como-recuperar-una-cuenta-de-roblox-hackeada_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/robux-hack-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/exos-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/hacker-destruye-la-ciudad-roblox-pokemon-go-miannn_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/how-to-get-free-gear-on-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0A 22156 bytes
SHA-256: 215089c9332ce34fbbb948a6c1be8e8f7f0758c96d80b84a38fad0a0a6134d0a
font_01_sfnt_off00006011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 19196 bytes
SHA-256: 2484382544affe8c7e4aaa4b089d3f209c800c085aa3c8ec4a92e3ecd452fe92

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